A small blacksmith anvil can be as long as a few inches and serves as an ideal work surface for tinsmithing, working with brass, and creating jewelry pieces. Collectors, too, might have an interest in a vintage blacksmith anvil to use as a display in a shop or even as a working tool. Any and all options are available through the wide range of blacksmith anvil inventories on eBay so you can be sure to find a classic piece of forging history for your workshop.
In 1604 there was a supernova that is commonly called Kepler's Supernova. That is the last one that was definitely observed (there may have been others since then that were obscured by dust in our own galaxy). The telescope was first used by Galileo in 1609 to observe the heavens (he didn't invent the telescope, however) and we haven't observed a supernova in our galaxy since before then!
The Crab Nebula seen in infrared by the Spitzer Space Telescope. The star that exploded as a supernova is referred to as the supernova's progenitor star. Two types of star explode as supernovae: white dwarfs and massive stars.t the centre of the Crab Nebula are two faint stars, one of which is the star responsible for existence of the nebula. It was identified as such in 1942, when Rudolf Minkowski found that its optical spectrum was extremely unusual.